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The Mystery of the Blue Train First Edition Cover 1928

Dust-jacket illustration of the first UK edition

The Mystery of the Blue Train is a work of detective fiction by Agatha Christie and first published in the United Kingdom by William Collins & Sons on 29 March 1928 and in the United States by Dodd, Mead and Company later in the same year. The UK edition retailed at seven shillings and sixpence (7/6) and the US edition at $2.00. The book features her detective Hercule Poirot.

Plot summary[]

Poirot boards Le Train Bleu, bound for the French Riviera. So does Katherine Grey, who is having her first winter out of England, after recently receiving a relatively large inheritance. On board Grey meets Ruth Kettering, an American heiress leaving her unhappy marriage to meet her lover. The next morning, though, Ruth is found dead in her compartment, a victim of strangulation. The famous ruby, "Heart of Fire", which had recently been given to Ruth by her father, is discovered to be missing. Ruth's father, the American millionaire Rufus Van Aldin, and his secretary, Major Knighton, convince Poirot to take on the case. Ruth's maid, Ada Mason, says she saw a man in Ruth's compartment but could not see who he was. The police suspect that Ruth's lover, the Comte de la Roche, killed her and stole the rubies, but Poirot does not think he is guilty. He is suspicious of Ruth's husband, Derek Kettering, who was on the same train but claims not to have seen Ruth. Katherine says she saw Derek enter Ruth's compartment. This also throws suspicion on Derek when a cigarette case with the letter "K" is found.

Poirot investigates and finds out that the murder and the jewel theft might not be connected, as the famous jewel thief The Marquis is connected to the crime. Eventually, the dancer Mirelle, who was on the train with her lover Derek but now spurned and vengeful, tells Poirot she saw Derek leave Ruth's compartment around the time the murder would have taken place. Derek is then arrested. Everyone is convinced the case is solved, but Poirot is not sure. He does more investigating and learns more information, talking to his friends and to Katherine, eventually coming to the truth.

Poirot asks Van Aldin and Knighton to come with him on the Blue Train to recreate the murder. He tells them that Ada Mason is really Kitty Kidd, a renowned male impersonator and actress. Katherine saw what she thought was a boy getting off the train, but it was really Mason. Poirot realized that Mason was the only person who saw anyone with Ruth in the compartment, so this could have been a lie. He reveals that the murderer and Mason's accomplice is Knighton, who is really "The Marquis". He also says that the cigarette case with the "K" on it does not stand for Kettering, but Knighton. Since Knighton was supposedly in Paris, no one would have suspected him. Derek did go into the compartment to talk to Ruth once he saw she was on the train, but he left when he saw she was asleep. The police then arrest Knighton. Kidd is presumably already in custody. The case is closed.



St. Mary Mead (Kent) and elsewhere[]


The Blue Train, Nice and the Riviera[]

References or Allusions[]

References to other works[]

  • St Mary Mead - although this is the home village of Katherine Grey, the description, the residents and the location bear no resemblance to the St Mary Mead of Miss Jane Marple.
  • Pierre Michel

Cultural references[]

  • Van Aldin mentions that Catherine of Russia wore the rubies that he has purchased, including "Heart of Fire".
  • At a glance, Ruth Kettering's face is described as being the face of a Raphael Madonna
  • George mentions Dr Crippen, when discussing with Poirot how murderers may be men of great personal charm
  • Mirelle is considering appearing in an operatic setting of Ibsen's Peer Gynt
  • Lady Tamplin mentions that one of Katherine Grey's outfits is the same one worn by Gladys Cooper in Palm Trees in Egypt.

References to actual history, geography and current science[]

Influence and Significance[]

Most of the novel was written in the Canary Islands at Oratava in 1926 with Christie dictating to Carlo while being disturbed by Rosalind. Christie described the novel as marking the time when she changed from an amateur to a professional writer: "I assumed the burden of a profession, which is to write even when you don't want to, don't much like what you are writing, and aren't writing particularly well. I have always hated The Mystery of the Blue Train, but I got it written, and sent off to the publishers." Christie recounted that in writing it she was driven by the need to earn money but that there was no joy in writing, "no elan", she could not see the scene in her mind's eye and the characters did not come alive.[1]

The novel's plot is based on the 1923 Poirot short story The Plymouth Express (much later collected in book form in the US in 1951 in The Under Dog and Other Stories and in the UK in 1974 in Poirot's Early Cases).

This novel features the first description of a village named St. Mary Mead. However this village is in Kent. The better known St. Mary Mead which is associated with Miss Marple is always described as being west of London.

The novel also features the first appearance of the minor recurring character, Mr Goby, who would later appear in After the Funeral and Third Girl. The book also features the first appearance of Poirot's valet, George.


The Times Literary Supplement gave a more positive reaction to the book than Christie herself in its issue of 3 May 1928. After recounting the set-up of the story the reviewer concluded: "The reader will not be disappointed when the distinguished Belgian on psychological grounds declines to suspect the arrested husband and, by acting on the suggestion of an ugly girl who consistently derides her preposterous mother, builds up inferences almost out of the air, supports them by a masterly array of negative evidence and lands his fish to the surprise of everyone".

The New York Times Book Review of 12 August 1928 said, "Nominally Poirot has retired, but retirement means no more to him than it does to a prima donna. Let a good murder mystery come within his ken, and he just can't be kept out of it."

Robert Barnard: "Christie's least favourite story, which she struggled with just before and after the disappearance. The international setting makes for a good varied read, but there is a plethora of sixth-form schoolgirl French and some deleterious influences from the thrillers. There are several fruitier candidates for the title of 'worst Christie'."

Film, TV or theatrical adaptations[]

There was a BBC radio adaptation starring Maurice Denham as Poirot.

Agatha Christie's Poirot[]

The novel was adapted in 2005 as episode 1 of series 10 of ITV's Agatha Christie's Poirot, and was aired by ITV on December 11 starring David Suchet as Poirot, Roger Lloyd Pack as Inspector Caux, James D'Arcy as Derek Ketterling, Lindsay Duncan as Lady Tamplin, Alice Eve as Lennox and Elliott Gould as Rufus Van Aldin.

The television film includes several changes from the original novel. There are many more of the main characters on board the train than in the original, for example Count de la Rochefour as well as Lady Tamplin and her family. This serves to increase the range of plausible suspects. In the adaptation Ruth becomes friends with Katherine Grey. They switch train compartments, and when Ruth is bludgeoned to death, making her features unrecognizable, Poirot speculates that the intended victim may have been Katherine. Rufus, Ruth's father, has a wife in the film, who became insane after the birth of Ruth, and Rufus has ensured her (his wife's) safekeeping at a convent, where she has become a nun.

The setting, music such as the song "Sing, Sing, Sing", fashion and hair styles are transposed to the late 1930s in keeping with the setting of the rest of the ITV Poirot series. In the original, the setting was the late 1920s.

Graphic novel adaptation[]

The Mystery of the Blue Train was released by HarperCollins as a graphic novel adaptation on 3 December 2007, adapted and illustrated by Marc Piskic (ISBN 0-00-725060-6). This was translated from the edition first published in France by Emmanuel Proust éditions in 2005 under the title of Le Train Bleu.

Publication history[]

The writing of this book (part of which took place on the Canary Islands in early 1927) was an ordeal for Christie. The events of 1926 with the death of her mother, her husband's infidelity and her breakdown and ten-day disappearance had left a deep psychological scar and now separated from Archie Christie and in need of funds she turned back to writing. The story did not come easily to her and she referred to this novel in her autobiography stating that she "always hated it". Her biography recounts how the total number of words in the book were carefully tallied up, showing what an ordeal Christie found it to be. It had its effect on her in the middle of wartime when, nervous that at some future point she might be in need of funds and need a fallback, she wrote Sleeping Murder and locked it securely in a bank vault for future publication. Curtain was written at the same time and similarly locked away, but publication of this latter book would not be possible until the end of her writing career as it recounts the death of Poirot.

The Mystery of the Blue Train was first serialised in the London evening newspaper The Star in thirty-eight un-illustrated instalments from Wednesday, February 1 to Thursday, 15 March 1928. The entire first two chapters were omitted from the serialisation and it therefore contained only thirty-four chapters. There were slight amendments to the text, either to make sense of the openings of an instalment (e.g. changing "She then..." to "Katherine then..."), or omitting small sentences or words, especially in the opening instalment where several paragraphs were missed. A reference to the continental Daily Mail at the start of chapter six (chapter eight in the book) was changed to "the newspaper" to avoid mentioning a competitor to The Star. Three chapters were given different names: chapter nine (eleven in the book) was called Something Good instead of Murder, chapter twenty-six (twenty-eight in the book) was called Poirot hedges instead of Poirot plays the Squirrel and chapter twenty-eight (chapter thirty in the book) was called Katherine's letters instead of Miss Viner gives judgement. The final chapter, called By the Sea in the book, was unnamed in the serialisation.

This is the only major work by Agatha Christie in which the UK first edition carries no copyright or publication date.

Book dedication[]

Christie's dedication in the book reads: "To the two distinguished members of the O.F.D. - Carlotta and Peter".

This dedication is a direct reference to the events of 1926 which included the death of Christie's mother on 5 April, the breakdown of her marriage to Archibald Christie and her famous ten-day disappearance in the December of that year. These were events which disturbed her for the remainder of her life and Christie learned that people she expected to be allies in her time of need turned away from her. One person who didn't was Charlotte Fisher (born c. 1901 – died 1976), who had been employed by Christie as both her own secretary and a governess to her daughter Rosalind in 1924. When the events of 1926 were starting to recede, Christie states that she "had to take stock of my friends". She and Fisher (to whom Christie referred affectionately as both "Carlo" and "Carlotta") divided her acquaintances into two separate categories; the Order of Rats and the Order of Faithful Dogs (O.F.D.) – chief among the latter group, Christie put Charlotte Fisher for her steadfast support. Also named in this latter group and the second subject of the dedication of the book is Peter, Christie's beloved terrier who had been purchased for Rosalind in 1924. Peter's devotion to Christie at this time was never forgotten by her and she returned that affection, writing to her second husband, Max Mallowan in 1930 that "You've never been through a really bad time with nothing but a dog to hold on to." Peter was also the subject of the dedication of Dumb Witness (on the dustjacket of which he is pictured), published in 1937, one year before his death. Charlotte Fisher, together with her sister Mary, also received a second dedication in a book in And Then There Were None in 1939.

Dustjacket blurb[]

The blurb of the first edition (which is carried on both the back of the jacket and opposite the title page) reads:
"Since the beginning of history, jewels have exercised a baneful spell. Murder and violence have followed in their wake. So with the famous Heart of Fire ruby. It passes into the possession of the beautiful American woman, Ruth Kettering, and doom follows swift upon it. Whose hand was it that struck her down? Were the jewels the motive for the murder, or were they only taken as a blind? What part did the beautiful foreign dancer play? These are some of the questions that have to be answered, and the story tells also how these strange and dramatic happenings effect the life of a quiet English girl who has felt convinced that "nothing exciting will ever happen to me." She uses very nearly those words to a chance acquaintance on the Blue Train - a little man with an egg-shaped head and fierce moustaches whose answer is curious and unexpected. But even Hercule Poirot, for it is he, does not guess how soon he will be called upon to unravel and complicated and intricate crime when the Blue Train steams in Nice the following morning and it is discovered that murder has been done." 

International titles[]

  • Chinese (simplified): 蓝色列车之谜 (The Mystery of the Blue Train)
  • Czech: Záhada Modrého vlaku (The Mystery of the Blue Train)
  • Dutch: Het Geheim van de Blauwe Trein (The Secret of the Blue Train)
  • Estonian Sinise rongi mõistatus (The Mystery of the Blue Train)
  • Finnish: Sininen juna (The Blue Train)
  • French: Le Train bleu (The Blue Train)
  • German: Der blaue Express (The Blue Express)
  • Hungarian: A kék express (The Blue Express), A titokzatos Kék Vonat (The Mysterious Blue Train)
  • Italian: Il mistero del treno azzurro (The Mystery of the Blue Train)
  • Japanese: 青列車の秘密 (The mystery of the Blue Train)
  • Polish: Tajemnica Błękitnego Expressu (The Secret of the Blue Train)
  • Portuguese: O Mistério do Comboio Azul (The Mystery of the Blue Train)
  • Romanian: Misterul trenului albastru (The Mystery of the Blue Train)
  • Russian: Тайна Голубого поезда,Тайна Голубого экспресса (The Mystery of the Blue Train)
  • Spanish: El Misterio del Tren Azul (The Mystery of the Blue Train)
  • Swedish: Mysteriet på Blå tåget (The Mystery on the Blue Train)
  • Turkish: Mavi Trenin esrarı (The mystery of the Blue Train)


  1. Agatha Christie, An Autobiography (London: HarperCollins, 2010), 319, ebook edition.
Hercule Poirot novels The Mysterious Affair at Styles - The Murder on the Links - The Murder of Roger Ackroyd - The Big Four - The Mystery of the Blue Train -Peril at End House - Lord Edgware Dies - Murder on the Orient Express - Three Act Tragedy - Death in the Clouds - The A.B.C. Murders - Murder in Mesopotamia - Cards on the Table - Dumb Witness - Death on the Nile - Appointment with Death - Hercule Poirot's Christmas - Sad Cypress - One, Two, Buckle My Shoe - Evil Under the Sun - Five Little Pigs - The Hollow - Taken at the Flood - Mrs McGinty's Dead - After the Funeral - Hickory Dickory Dock - Dead Man's Folly - Cat Among the Pigeons - The Clocks - Third Girl - Hallowe'en Party - Elephants Can Remember - Curtain
Miss Marple novels The Murder at the Vicarage - The Body in the Library - The Moving Finger - A Murder is Announced - They do it with Mirrors - A Pocket Full of Rye - 4.50 from Paddington - The Mirror Crack'd from Side to Side - A Caribbean Mystery - At Bertram's Hotel - Nemesis - Sleeping Murder
Tommy and Tuppence novels The Secret Adversary - N or M? - By the Pricking of My Thumbs - Postern of Fate
Superintendent Battle novels The Secret of Chimneys - The Seven Dials Mystery - Cards on the Table - Murder is Easy - Towards Zero
Colonel Race novels The Man in the Brown Suit - Cards on the Table - Death on the Nile - Sparkling Cyanide
Other novels The Sittaford Mystery - Why Didn't They Ask Evans? - And Then There Were None - Death Comes as the End - Sparkling Cyanide - Crooked House - They Came to Baghdad - Destination Unknown - The Pale Horse - Endless Night - Passenger to Frankfurt
Published as Mary Westmacott Giant's Bread - Unfinished Portrait - Absent in the Spring - The Rose and the Yew Tree - A Daughter's a Daughter - The Burden